Apparatus for bending pipe.



PATENTED MAR. 21, 1905'.

L. H. BRINKMANV. APPARATUS FOR BENDING PIPE,-

APPLICATION FILED AUG. 6, 1904.

L Louis H. Elfin mdn. 1S

E fies ses Q D-Twmm.

, of Connecticut, have invented anew: and

Patented. March 2 NITEYD: STATES LOUIS H. BRINKMA'N', or WEsT-nARTFoRnfcoNhEcricUT, ASSIGNOR'YTO' WH-ITLOCK APPARATUS FQ 'B 'n'DINQ PlPE.

, eoiL PIPE COMPANY, or.v WEST HARTFORD, CONNECTICUT,

HACORPORATIONOF coNNEcTIo t i 1 v S1?ECJIEICA'IIIONforming part of LettersPatent lir 785,082,:z1atedMargh 21., 1905.

' A umionfiieatuguae,1904;, saiin mtlaeee' To all who'r rp it'mrty concern: I

Be it known that I, Lotns'H'. BRINKMAN; a"

citizen of the United States, residingat West" Hartford, in the'county of Hartfordand State. gust-7:

ful Improvement in-AppMatus ,forBen Pipe, of which the followingi-s a specificat on accompanied by drawings forming apart of ,thesame, inwhich to apparatus as is'necessary. toillu'strate thena-t ture of myinvention ifFig. '2-is a vertical sectional view on th'c'plane ()fgflfFig; .11-

- Fig. 3 is a plan View of the parts shown in 5 Fig. 1,'bu't in their relative position when a pipe has been Kbent." ;Fig. 4 a 'sectional view-on line 4, Fig. 1; and Fig. 5 isan end View of the reciprocatingformer;"1'"

- Similar referen'ce figure's. refer "to similar 2 parts in the dilferent views.

The object of m presentinvention is to provide an apparatus for bending pipe by which the stretching of the outer side of the bent 1 section of the pipe'is obviatedg and itconsists.

in the construction and arrangement of parts,

as hereinafter described', and pointed out in the annexed claims.

Referring to the accompanying-drawings, 1

denotes a table provided on its'up'per face with 3 a groove 2 for a reciprocating former 3, mountedupon the end of a rod 4, to which a longitudinal movement isimparted by any suitable known mechanism, (Not shown'.) The former 3 is provided with parallel sides 5 5 and a rounded end 6, corresponding to the desired curvature of the pipe. The parallel sides 5 5 and the ro'nnded'end 6 are provided with a semicircular groove 7, adapted to fit the side of thepipe to bebent. Mounted upon.the

4 table 1 are a pair ofmandrels 8 9, with their outer ends held in the upturned brackets 1010 upon the outer ends of swinging arms 11' 11. The mandrel's 8 and 9 may be conveniently held in the brackets 10 10 by providing the outer ends of the mandrels with screW-th reads 12 12 and clamping-nuts 13 14, said nuts being squared and clamped against the flat sides of The inner ends of thearms 11 versely adjustable on plates'll, said.

being, provided. withways 18 and clamping-bolts 19', extending through; elon-T; ,gatedslots'20in the arms-11 and gbeing pro- ;Vi'dedqwithclampingfliuts21;" The;plates 17 reigp i voted on bolt-heads 22, carried yjpla t'es 23', "which are supportedlby the; .'are capable of adjustment thereonin'a groove '24:. at right anglesto the groove 2. The plates 23 are held in position by bolts 25, e through slots 26 in the table'l and,

Ei gure l is aplanvievi 'f so inuch offthe l5of themahdrels in a horizontal position and preferably with ashort space 16between thcinner 'ends of-the mandrels plates 1 7 Car y are transzrtending I carrying clamping-nuts 27. Each of ,the a mail-1 is J therefore adjustable .in two directions+ -namely, in the groove 24 ina line at right armsl ll at their inner ends are providedwith". upturned flanges '28 at 'rig'htangles to the up per surface of the arms 11 to form a bearing,

surface forthe outerside of the pi bentand resist the bending strain applied to the pipe. Adjustably' mounted upon each of the arms 11 are angular stop-plates 29, which are adjustably clampedto the"arms by bolts.

30, extending through an elongated slot 31 in the arm 11. and carrying a clamping-nut 32;

The stop-plates 29' are slotted at 33 for-conthe man;

venience in inserting and removing drels 8 and").

The pipe-34 to be leent "is shown in sectional view in .Fig. 2 and in full in Fig. 3, and

35 in Fig. 1. The inner ends 15 of- .its position is indicated by the broken lines the mandrels8 and 9 are spherical in shape and of sufficient size to substantially fill the interior of the pipe, as, represented in I Fig. ,mandrels are inserted in theepposite ends of 2. The

' bear against the opposite ends of'the hold it centrally on the mandrels.

pipe and Power is the brackets 10 to hold the inner free ends 15 then applied to the push-rod 4 to slide the stantially in the plane of the outer side of'the used.

,i held on the free ends of said mand rels.

strain to a pipe held on said mandrels by which ,ing, and the stretching strain, which wouldv tend to elongate the outer side Of tI IBQ pipe, is'

' The stretching of the outer side of the pipe to accommodate difl'erent sizes of. pipe and former 3 along the groove 2 from the position i shpwn in Fig. l to that shown in Fig. 3. The 1 advance movement of the former 3 against the l central section of the pipeas it is heldupon the mandrels 8 and 9 causes the arms 11 11 to swing on their bolt-heads- 22 into the position. shown in Fig. 3 and the central section of the pipe to be bent around I the curved end 6 of the former 3. The swinging arms 11 are adjusted on the plate 17 and relatively to the bolt-head 22, so the axis of. rotation of the arms 11 will correspond substantially with the outer side of the pipe, so that as the pipe is bent around the curved end of theformer the only deforn'iing strains applied to the pipe are those which upset the metal on the inner side of the pipe during theoperation of bend.

entirely avoided. If the pipe 35 were to be bent by forcing it around the curved end of the former by pressure applied to its opposite ends, it is obvious that the inner side of the pipe, which would be shortened in the act of bending, would be upset and that the outer side of the pipe, which would be elongated in the act of bending, would be stretched.

reduces the thickness of the 'pipe, and consequently weakens it, and it is the object of my invention to obviate this injurious stretching of the outer side of the pipe, which I accomplish in my present apparatus by supporting the pipe upon mandrels carried by the swinging arms 11 11 and controlling the swinging movement of the arms on axes lying sub:

pipe. 'As it may be desirable to bend pipes of different sizes in the same apparatus, I have provided two adjustments of the arms 11 11 also to allow formers of different Sines to be VVhatI claim as myinvention, and desire to secure by Letters Patent, is

L In an apparatus for bending pipe, the combination witha former, of a pair 6f swinging arms, a pair of mandrels held by said arms in alinement with each other, with the opposing ends of said mandrelsfree to enter g opposite ends of the pipe to be bent, and means for applying a bending strain to a pipe 2.'In an apparatus for bending pipe, the combination of a former, a pair of mandrels held in alinement with each other, with the opposing ends of the mandrels free to enter 1 the opposite ends of the pipe to be bent, each i of said mandrcls being capable of a swinging I movement about an axis substantially coincil dent with the side of the pipe opposite the former, and means for applying a bending the pipe is wrapped around said former. In an apparatusfor bending pipe, the

, ment with eachother, with the opposing ends of said mandrels free toenter the opposite ends of the pipe to be bent, a pair of pivoted arms supporting said mandrels, and means for adjusting the axes of said pivoted arms relatively to the'pipe held on said mandrels, and means for bending said pipe around. said former.

4.- In an apparatus for bending pipe, the combination with a former, of a pair of mandrels held in alinement with each other, with the opposing ends of the mandrels free to enter the opposite ends of the pipe to be bent, means for adjustinga pipe longitudinally on said mandrels, and means for wrapping a pipe held on said mandrels around the former.

In an apparatus for bending pipe, the combination with a pair of r-nandrels in alinement with each other, and having their opposing ends free to enter the opposite ends of the pipe to bebent, a pair of holding-arms for said'mandrels capable'of a swinging motion,

and a reciprocating former by which a bending strain is applied to a pipe held on said mandrels. V

6. In an apparatus for bending pipe, the combination with a pair of mandrels held in alinement, with the opposing ends of said mandrels free to enter the opposite ends of the pipe to be bent, said mandrels beingcapable of a swinging movement in opposite directions, and a reciprocating former adapted to apply a bending strain to a pipe held on said mandrels,.

7. In an apparatus for bending pipe, the combination of a pair of mand relsheld in alinement, with their opposing ends capable of entering the opposite ends of the pipe to be bent, a reciprocating former adapted to apply a bendingstrain to a pipe held on said mandrels, said mandrcls being capable of 'a swinging movementin opposite directions about axes at right angles to the plane of said reciprocating former. n

8. In an apparatus for bending pipe, the combination with a reciprocating former, of a pair of mandrels held in alinement with each otherin a line at right angles to the line of movement of said former, saidmandrels being capable of" a swinging movement, and meansfor adjusting the axes of rotation of said mandrels. 1

9. In an apparatus for bending pipe, the combination with a table having ways for a reciprocating former, of -a reciprocating former, a pair of swinging arms pivotally on said table, brackets on said arms, In andrels held-insaid brackets with their free ends adapted'toenter the pipe to be bent, and means for longitudinally adjusting said mandrels in said brackets.

11. In an apparatus for bending pipe, the

combination with a table having ways for a reciprocating ,former, of a reciprocating former, pivots for a pairof swinging arms, me ans for adjusting said pivots relativelyto s'aid'former, swinging arms on said pivots,

- and inandrels held by said swinging arms.

12.' In an apparatus for bending pipe, the

combination with a table provided with ways for a reciprocating former, of a reciprocating former, swinging arms pivotally mounted on said table, means for adjusting said arms relativcly to said former, means'for adjusting said arms relatively to their axes of rotation and combination with a reciprocating former, of

mandrels carried by said arms.

13. In an apparatus for bending pipe, the combination with a reciprocating former, of

a pair of swinging arms. means for adjusting said arms relatively to said former, means for adjusting said arms relatively to their axes of rotation andmandrels carried by said arms.

14. In an apparatus for bending pipe, the

a pair of swinging.arms, a pair of mandrels' carried by said arms and adapted to enter the opposite ends-of the pipe to be bent,t he axes of said swinging, arms substantially coinciends of the pipe to be bent, of a reciprocating former adapted to apply a bending strain to a pipe held on said mandrels and flanges arranged to bear against a pipe held on said 'mandrels and to resist the bending strain exerted by said former. v

16. In an apparatus for bending pipe, the combination with a reciprocating former,'of a pair of swinging arms, mandrels carried by' said'arms, and adapted to enter the opposite ends of the pipe to bejbent, and stops adjustably held on said arms and adapted to bear against the ends of the pipe.

Dated this 3d day-of August, 1904. LOUIS RINK AN;

Witnesses: I i a i ARTHI R S. HYDE, E. H. TUCKER. 

